JP7672610B2 - Loading Device - Google Patents

Description

The present invention relates to a load device, and in particular to a load device using a link mechanism.

As a conventional loading device, for example, the structure described in the following Patent Document 1 is known. As shown in FIG. 4, a press device 12 as a conventional loading device has a bottom plate 22, a support 21 provided on the bottom plate 22, a top plate 20 supported by the support 21, a pantograph jack 30 attached to the top plate 20, and a lifting unit 60 attached to the pantograph jack 30. The lifting unit 60 is composed of a plate-shaped pressing unit 62, and can be raised and lowered between the top plate 20 and the bottom plate 22 by the extension and contraction of the pantograph jack 30.

When compressing the object to be compressed 70 placed on the bottom plate 22, the pantograph jack 30 is extended by turning the handle 32 of the pantograph jack 30, and the lifting part 60 is lowered. As the lifting part 60 is lowered, the pressing surface 62a formed on the lower surface of the pressing part 62 presses the object to be compressed 70, and the object to be compressed 70 is compressed between the pressing part 62 and the bottom plate 22.

JP 2011-67855 A

However, the press device 12 described in Patent Document 1 has a problem in that the load applied to the compressed body 70 when compressing the compressed body 70 can only be empirically estimated from the amount of rotation of the handle 32 of the pantograph jack 30.

This invention was made to solve these problems, and aims to provide a load device that can measure the load applied to a compressed body when the compressed body is compressed.

In order to solve the above problems, the loading device of the present invention comprises a fixed part that does not move , a movable part that is freely movable along a support pillar provided on the fixed part, a link mechanism that moves the movable part by an extension and contraction action, and a load measuring part provided on the movable part, and as the movable part moves, the movable part presses a load bearing body provided between the fixed part and the movable part to apply a load, and the load measuring part measures the load applied to the load bearing body, and the movable part has a protruding part including a protruding surface that contacts and presses the load bearing body, and an imaging part that is vertically spaced from the load bearing body and does not come into contact with it when the protruding surface contacts the load bearing body, and images the state in which the load bearing body is pressed .

The moving section may also be configured to have a protruding section including a protruding surface that contacts and presses the load object, and an imaging section that does not contact the load object when the protruding surface contacts the load object.
The apparatus may also be configured to have a display unit that displays the load applied to the load-bearing body measured by the load measuring unit.

The loading device of this invention is equipped with a link mechanism that moves the moving part by an extension and contraction action, and a load measuring part provided on the moving part. When the moving part moves, the moving part presses the loaded body provided between the fixed part and the moving part to apply a load, and the load measuring part is configured to measure the load applied to the loaded body, so that it is possible to measure the load applied to the compressed body when the compressed body is compressed.

FIG. 1 is a front view of a press device according to a first embodiment of the present invention. FIG. 2 is a side view of the press apparatus shown in FIG. FIG. 11 is a front view of a press apparatus according to a second embodiment of the present invention. FIG. 1 is a schematic diagram of a conventional press device.

Embodiment 1.
A first embodiment of the present invention will be described below with reference to Figures 1 and 2 of the accompanying drawings. Note that parts that are the same as or equivalent to those in the conventional example are given the same reference numerals.
1 is a schematic diagram of a press device 10 according to a first embodiment of the present invention. The press device 10 has a horizontally disposed bottom plate 22, four support columns 21 provided on the bottom plate 22, and a top plate 20 supported by the support columns 21. A compressed body 70, which is an object to be compressed and is placed on an upper surface of the bottom plate 22, is placed on the bottom plate 22. The bottom plate 22 is also provided with tapped holes 24 for fixing the compressed body 70 with screws or the like. The press device 10 constitutes a loading device, the bottom plate 22 constitutes a fixing portion, and the compressed body 70 constitutes a loaded body.

An eye bolt 23 for suspending the press device 10 is attached to the upper side of the top plate 20. A pantograph jack 30 is attached to the lower side of the top plate 20. The pantograph jack 30 constitutes a link mechanism with four links.

The pantograph jack 30 has a shaft 31, and the pantograph jack 30 extends and retracts by rotating the shaft 31. A motor 50 that generates torque for rotating the shaft 31 is provided near the pantograph jack 30. The motor 50 is a servo motor and constitutes a drive unit. The motor 50 transmits torque to the shaft 31 through a gear mechanism (not shown). Although the motor 50 is a servo motor, other types of motors such as a stepping motor may also be used. Although the motor 50 transmits torque to the shaft 31 through a gear mechanism, other types of torque transmission mechanisms such as a belt mechanism may also be used.

The lifting unit 60 is provided at the bottom of the pantograph jack 30. The lifting unit 60 has a load cell 64 connected to the pantograph jack 30, a lifting plate 61 provided on the underside of the load cell approximately parallel to the bottom plate 22, and a pressing unit 62 provided on the underside of the lifting plate 61. The pressing unit 62 is provided to protrude downward from the lifting plate 61. The load cell 64 is configured to be able to measure loads in both compression and tension directions. A pressing surface 62a is formed on the underside of the pressing unit 62, which faces the bottom plate 22 in parallel. The lifting unit 60 constitutes a moving unit, the pressing unit 62 constitutes a protruding unit, the pressing surface 62a constitutes a protruding surface, and the load cell 64 constitutes a load measuring unit.

The lifting section 60 has cylindrical linear guides 63 provided on the upper surface of the four corners of the lifting plate 61. The four pillars 21 penetrate the linear guides 63 and the lifting plate 61. By extension and contraction of the pantograph jack 30, the lifting plate 61 is configured to be able to move up and down in the A direction along the pillars 21 between the bottom plate 22 and the top plate 20 while remaining approximately parallel, i.e. approximately horizontal, to the bottom plate 22.

As shown in FIG. 2, a display unit 80, which is a load cell conditioner that displays the load measurement results of the load cell 64 of the lifting unit 60, is attached to the top plate 20. The display unit 80 is attached so that the load measurement result display can be seen when the press device 10 is viewed from the side. As a means for displaying the measured value in the display unit 80, any display such as a 7-segment LED display, a 7-segment liquid crystal display, or a liquid crystal display can be used.

A camera 81 and an LED 82 are attached to the underside of the lift plate 61 of the lift section 60. The camera 81 is a CCD camera and is provided so as to be able to capture an image of the compressed body 70 placed on the bottom plate 22. The LED 82 is an illumination LED and is used to illuminate the compressed body 70 to capture an image by the camera 81 and to observe it with the eyes of an operator. The camera 81 and the LED 82 are formed to be sufficiently small in size so that when attached to the underside of the lift plate 61, their tips are above the pressing surface 62a of the pressing section 62. The camera 81 constitutes the imaging section, and the LED 82 constitutes the lighting section.

Next, the operation of the press device 10 of this embodiment 1 will be described. As shown in Figures 1 and 2, the compressed body 70 is placed on the bottom plate 22. The compressed body 70 is fixed to the bottom plate 22 by screws using the tapped holes 24.

When compressing the compressed body 70, the motor 50 is driven to apply torque to the shaft 31 of the pantograph jack 30 to rotate it. Then, the pantograph jack 30 extends, and the lifting part 60 descends in the direction A along the support 21 while keeping the lifting plate 61 horizontal.

When the lifting unit 60 descends, the pressing surface 62a of the pressing unit 62 comes into contact with the compressed body 70, and the compressed body 70 is pressed and compressed by the pressing unit 62. At this time, the load applied to the compressed body 70 is measured by the load cell 64, and the measurement result of the load is displayed on the display unit 80.

At this time, the camera 81 also captures an image of the compressed body 70. This allows the compressed state of the compressed body 70 to be observed and recorded. Furthermore, the LED 82 illuminates the compressed body 70. This provides sufficient brightness for the camera 81 to capture an image of the compressed body 70 and for an operator to observe the compressed state.

The camera 81 and the LED 82 are attached to the lift plate 61 with their tips formed above the pressing surface 62a of the pressing portion 62, so that even if the pressing surface 62a comes into contact with the compressed body 70, the camera 81 and the LED 82 do not come into contact with the loaded body 70. Therefore, when the pressing portion 62 applies a load to the compressed body 70, no load is applied to the camera 81 and the LED 82, and the camera 81 and the LED 82 do not hinder the compression of the compressed body 72.

In this way, the lifting/lowering unit 60 is provided so as to be movable along the bottom plate 22 and the support 21 provided on the bottom plate 22, the link mechanism 30 that moves the lifting/lowering unit 60 by an extension/retraction action, and the load cell 64 provided on the lifting/lowering unit 60. When the lifting/lowering unit 60 moves, the lifting/lowering unit 60 presses the compressed body 70 provided between the bottom plate 22 and the lifting/lowering unit 60 to apply a load, and the load cell 64 measures the load applied to the compressed body 70, so that the load applied to the compressed body 70 when compressing the compressed body 70 can be measured.

The lifting unit 60 also has a pressing unit 62 including a pressing surface 62a that contacts and presses the compressed body 70, and a camera 81 that does not contact the compressed body 70 when the pressing surface 62a contacts the compressed body 70, so that the compressed state of the compressed body 70 can be imaged.

In addition, since the display unit 80 displays the load applied to the compressed body 70 measured by the load cell 64, the load applied to the compressed body 70 can be confirmed during the compression operation.

In this embodiment 1, the compressed body 70 is fixed to the bottom plate 22, and the press device 10 is used as a compression device in which the pressing portion 62 compresses the compressed body 70. However, the press device 10 may also be used as a tension device that tensions the compressed body 70.

The operation of the press device 10 when used as a pulling device is described below. The compressed body 70 is fixed to the bottom plate 22 by screwing using the tapped holes 24. The pantograph jack 30 is extended to bring the pressing surface 62a of the pressing part 62 of the lifting part 60 into contact with the compressed body 70, and the compressed body 70 is fixed to the pressing surface 62a by screwing using tapped holes (not shown).

Next, the motor 50 is driven to apply torque to the shaft 31 to rotate the pantograph jack 30 in the direction of contraction. When the pantograph jack 30 contracts, the lifting unit 60 attempts to rise along the support 21 while maintaining horizontality in the direction A. Since the compressed body 70 is fixed to the bottom plate 22 and the pressing surface 62a, the compressed body 70 is loaded in the tensile direction by the pressing unit 62. This load in the tensile direction is measured by the load cell 64, and the measurement result is displayed on the display unit 80. In addition, the camera 81 captures an image of the compressed body 70, so that the state in which the compressed body 70 is being tensioned can be observed and recorded. Furthermore, since the compressed body 70 is illuminated by the LED 82, sufficient brightness is obtained for photographing by the camera 81 or for observation by the naked eye of an operator.

Even when the press device 10 is used as a pulling device, the camera 81 and the LED 82 do not come into contact with the load-bearing body 70 when the pressing surface 62a comes into contact with the compressed body 70. Therefore, no load is applied to the camera 81 and the LED 82, and therefore the camera 81 and the LED 82 do not impede the compression of the compressed body 72.

Embodiment 2.
Next, a configuration of a loading device according to a second embodiment of the present invention will be described. In the following embodiments, the same reference numerals as those in Fig. 1 and Fig. 2 denote the same or similar components, and therefore detailed descriptions thereof will be omitted.
In the configuration of the loading device according to the second embodiment, the positional relationship between the pantograph jack 30 and the lifting unit 60 is upside down compared to the first embodiment.

A front view of the press device 11 according to the second embodiment is shown in FIG. 3. The pantograph jack 30 is attached to the bottom plate 22. The pantograph jack 30, the load cell 64 of the lifting unit 60, the lifting plate 61, and the pressing unit 62 are attached upside down from those in the first embodiment. That is, the load cell 64 is attached to the upper side of the pantograph jack 30, the lifting plate 61 is attached to the top of the load cell 64, and the pressing unit 62 is attached to the upper surface of the lifting plate 61 approximately parallel to the top plate 20. The pressing surface 62a facing the top plate 20 approximately parallel is formed on the upper surface of the pressing unit 62. In addition, the camera 81 and the LED 82 are attached to the upper surface of the lifting plate 61 with sufficiently small dimensions so that their tips are lower than the pressing surface 62a of the pressing unit 62. Additionally, the top plate 20 constitutes the fixed portion. The rest of the configuration is the same as in embodiment 1.

Next, the operation of the press device 11 in this embodiment 2 will be described. When the press device 11 is used as a compression device for compressing the compressed body 70, the compressed body 70 is placed on the pressing surface 62a of the pressing unit 62 and fixed by screwing into a tapped hole not shown. Then, the motor 50 is driven to apply torque to the shaft 31, the pantograph jack 30 is extended, and the lifting unit 60 is raised along the support 21 in the A direction while maintaining the horizontal position. Then, the upper part of the compressed body 70 comes into contact with the top plate 20 as the lifting unit 60 rises, and the compressed body 70 is pressed and compressed by the pressing unit 62. At this time, the load applied to the compressed body is measured by the load cell 64, and the measurement result of the load is displayed on the display unit 80. In addition, the camera 81 captures an image of the compressed body 70, so that the compressed state of the compressed body 70 can be observed and recorded.

When the press device 11 is used as a pulling device for pulling the compressed body 70, the compressed body 70 is fixed to the pressing part 62 by screwing it into a tapped hole (not shown). Then, the pantograph jack 30 is extended to bring the top plate 20 into contact with the upper part of the compressed body 70, and the compressed body 70 is fixed to the top plate 20 by screwing it into a tapped hole (not shown).

Next, the motor 50 is driven to apply torque to the shaft 31, rotating the pantograph jack 30 in the direction of contraction. When the pantograph jack 30 contracts, the lifting unit 60 attempts to descend along the support 21 in direction A while remaining horizontal. Since the compressed body 70 is fixed to the top plate 20 and the pressing surface 62a, the compressed body 70 is loaded in the tensile direction by the pressing unit 62. This load in the tensile direction is measured by the load cell 64, and the measurement result is displayed on the display unit 80. In addition, the camera 81 captures an image of the compressed body 70, so the state in which the compressed body 70 is being tensioned can be observed and recorded.

In addition, whether the press device 11 is used as a compression device or a tension device, the compressed body 70 is illuminated by the LED 82, providing sufficient brightness for photographing with the camera 81 or for observation with the naked eye of an operator.

In the first and second embodiments, the compressed body 70 is fixed to the top plate 20, the bottom plate 22, or the pressing portion 62 by screwing into a tapped hole. However, when the press device 10 and the press device 11 are used as compression devices, the compressed body 70 does not necessarily need to be fixed if it is made of a material that does not shift laterally when pressed by the pressing portion 62, or if the pressing conditions are such that the compressed body 70 does not shift laterally. In addition, the method of fixing the compressed body 70 may be a method other than screwing.

In the first and second embodiments, the load cell 64 is directly connected to the pantograph jack 30, but it may be provided at another position as long as it can measure the load applied to the compressed body by the pressing unit 62. For example, the lift plate 61 may be directly connected to the pantograph jack 30, and a load cell may be provided inside the pressing unit 62. The load cell 64 is configured to be able to measure loads in both the compression and tension directions, but when the press device 10, 11 is used only as a compression device, a load cell 64 capable of measuring loads only in the compression direction may be used, and when the press device 10, 11 is used only as a tension device, a load cell 64 capable of measuring loads only in the tension direction may be used.

In addition, in the first and second embodiments, the motor 50 is used to apply torque to the shaft 31 of the pantograph jack 30 to rotate it, but the shaft 31 may be rotated using other means, such as a handle.

In addition, by providing a scale on the support 21, the distance of ascent or descent of the lifting section 60 can be measured and used as a guide to estimate the load applied to the compressed body 70 by the pressing section 62.

In addition, in the first and second embodiments, the lifting unit 60 moves up and down along the vertical direction A, but the press devices 10 and 11 may be configured so that the lifting unit 60 moves sideways.

In addition, in the first and second embodiments, the measurement results of the load cell 64 are displayed on the display unit 80, which is a conditioner. However, instead of or in addition to the display unit 80, a display unit such as a monitor may be provided outside the press device 10, 11 to display the measurement results of the load cell 64.

The gist of the loading device according to the present invention is as follows: That is, the device includes the bottom plate 22, the lifting unit 60 that is movably arranged along the support 21 provided on the bottom plate 22, the link mechanism 30 that moves the lifting unit 60 by extending and contracting, and the load cell 64 provided on the lifting unit 60. When the lifting unit 60 moves, the lifting unit 60 presses the compressed body 70 provided between the bottom plate 22 and the lifting unit 60 to apply a load, and the load cell 64 measures the load applied to the compressed body 70. The lifting unit 60 is configured to include a pressing unit 62 that includes a pressing surface 62a that contacts and presses the compressed body 70, and a camera 81 that does not contact the compressed body 70 when the pressing surface 62a contacts the compressed body 70, and also includes the display unit 80 that displays the load applied to the compressed body 70 measured by the load cell 64.

The loading device according to the present invention comprises a fixed part, a moving part 60 that is freely movable along a support 21 provided on the fixed part 22, a link mechanism 30 that moves the moving part 60 by extending and contracting, and a load measuring part 64 provided on the moving part 60. As the moving part 60 moves, the moving part 60 presses the load-bearing body 70 provided between the fixed part 22 and the moving part 60 to apply a load, and the load measuring part 64 measures the load applied to the load-bearing body 70, so that the load applied to the load-bearing body when the load-bearing body is compressed can be measured.

20 Top plate (fixed part)
21 Pillar 22 Bottom plate (fixed part)
30 Pantograph jack (link mechanism)
60 Lifting section (moving section)
62 Pressing portion (protruding portion)
62a pressing surface (protruding surface)
64 Load cell (load measuring part)
70 Compressed body (loaded body)
80 Display unit 81 Camera (imaging unit)

Claims (2)

A stationary part (22) that does not move ;
a movable part (60) provided movably along a support (21) provided on the fixed part;
A link mechanism (30) that moves the moving part (60) by extending and contracting;
A load measuring unit (64) provided on the moving unit (60),
When the moving part (60) moves, the moving part (60) presses a load-bearing body (70) provided between the fixed part (22) and the moving part (60) to apply a load,
The load measuring unit (64) measures the load applied to the load-bearing body (70),
The moving part (60) is
a protruding portion (62) including a protruding surface (62a) that contacts and presses against the load body (70);
and an imaging section (81) for imaging a state in which the load bearing body (70) is pressed against the protruding surface (62a) when the protruding surface (62a) comes into contact with the load bearing body (70), and the protruding surface (62a) is spaced vertically from the load bearing body (70) and does not come into contact with the load bearing body (70). The loading device according to claim 1, further comprising a display unit (80) that displays the load applied to the load object (70) measured by the load measuring unit (64).

Images